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Submission #838486

# Submission time Handle Problem Language Result Execution time Memory
838486 2023-08-27T08:53:45 Z BlockOG XORanges (eJOI19_xoranges) C++14
100 / 100
 271 ms 3124 KB 
#include <iostream>

using namespace std;

unsigned int o[200000], b1[100001], b2[100001];

unsigned int bxor(unsigned int b[100001], int i) {
    i++; unsigned int res = 0;
    while (i > 0) {
        res ^= b[i];
        i -= i & (-i);
    }
    return res;
}

void bchg(unsigned int b[100001], int n, int i, unsigned int c) {
    i++; while (i <= (n + 1) / 2) {
        b[i] ^= c;
        i += i & (-i);
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    int n, q; cin >> n >> q;
    for (int i = 0; i < n; i++) {
        cin >> o[i];
        bchg(i & 1 ? b2 : b1, n, i / 2, o[i]);
    }

    for (int it = 0; it < q; it++) {
        int code; cin >> code;
        if (code == 1) {
            int i; unsigned int j; cin >> i >> j; i--;
            bchg(i & 1 ? b2 : b1, n, i / 2, j ^ o[i]);
            o[i] = j;
        } else {
            int l, u; cin >> l >> u;
            if (!((u-- - --l) & 1)) {
                cout << 0 << endl;
                continue;
            }

            cout << (bxor(l & 1 ? b2 : b1, l / 2 - 1) ^ bxor(l & 1 ? b2 : b1, u / 2)) << endl;
        }
    }
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 4 ms 340 KB Output is correct
12 Correct 4 ms 340 KB Output is correct
13 Correct 6 ms 340 KB Output is correct
14 Correct 6 ms 340 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 258 ms 3040 KB Output is correct
2 Correct 271 ms 3004 KB Output is correct
3 Correct 267 ms 3124 KB Output is correct
4 Correct 251 ms 3012 KB Output is correct
5 Correct 254 ms 3048 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 4 ms 340 KB Output is correct
12 Correct 4 ms 340 KB Output is correct
13 Correct 6 ms 340 KB Output is correct
14 Correct 6 ms 340 KB Output is correct
15 Correct 258 ms 3040 KB Output is correct
16 Correct 271 ms 3004 KB Output is correct
17 Correct 267 ms 3124 KB Output is correct
18 Correct 251 ms 3012 KB Output is correct
19 Correct 254 ms 3048 KB Output is correct
20 Correct 162 ms 2420 KB Output is correct
21 Correct 154 ms 2408 KB Output is correct
22 Correct 159 ms 2396 KB Output is correct
23 Correct 242 ms 2940 KB Output is correct
24 Correct 244 ms 2960 KB Output is correct